PitBull Unit Frames 4.0

v4.0.0-beta42-4-gbe3b7ff

Change log

Benjamin Staneck:
- more spring cleaning in the filter area
- remove some old compat code. I want to cry.
- exclude some dev only files/folders from being packaged
- fix the attempt to call field 'GetBestUnitID' (a nil value) error on 5.2.